I bought licence last saturday with paypal and it still shows pending, paypal shows that it is paid and money from my credit card was taken. Last time I bought licence I think i could use it the next day and now it takes so much time which worries me.

same here.. I get an e-mail notification when pay-pal payment notification is not processed on my side or is rejected for some reason (I check these cases manually asap), while your transaction was marked at pay-pal as "properly served and processed" on my side. it might happen when order is deleted in zmodeler account before it was fully processed and served, but this was not a case in your scenario. I'll keep deeper inspection on similar cases if they arise again.